Fe, N, S co-doped carbon network derived from acetate-modified Fe-ZIF-8 for oxygen reduction reaction

被引:4
作者
Zhang, Junyuan [1 ,2 ]
Deng, Ziwei [1 ,2 ]
Bai, Shuli [1 ,2 ]
Liu, Changyu [1 ,2 ]
Zhang, Mengchen [1 ,2 ]
Peng, Chao [1 ,2 ]
Xu, Xiaolong [1 ,2 ]
Jia, Jianbo [1 ,2 ]
Luan, Tiangang [1 ,2 ]
机构
[1] Wuyi Univ, Sch Environm & Chem Engn, Jiangmen Key Lab Synthet Chem & Cleaner Prod, Jiangmen 529020, Peoples R China
[2] Wuyi Univ, Inst Carbon Peaking & Carbon Neutralizat, Jiangmen 529020, Peoples R China
基金
中国国家自然科学基金;
关键词
Acetate -modified Fe-ZIF-8; Electrospinning; Hierarchical pore; Fe; S co -doped carbon electrocatalyst; Oxygen reduction reaction; AIR BATTERIES; ELECTROCATALYSIS; TEMPERATURE; CATALYSTS; INSIGHT;
D O I
10.1016/j.jcis.2023.12.047
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In this work, potassium acetate (KAc) was added during the synthesis of a Zn-Fe based metal-organic framework (Fe-ZIF-8) to increase the fixed amount of Fe while simultaneously enhancing the number of pores. Electrospinning was utilized to embed KAc-modified Fe-ZIF-8 (Fe-ZIF-8-Ac) into the polyacrylonitrile nanofiber mesh, to obtain a network composite (Fe@NC-Ac) with hierarchical porous structure. Fe@NC-Ac was co-pyrolyzed with thiourea, resulting in Fe, N, S co-doped carbon electrocatalyst. The electrochemical tests indicated that the prepared catalyst displayed relatively remarkable oxygen reduction reaction (ORR) catalytic activity, with an onset potential (Eonset) of 1.08 V (vs. reversible hydrogen electrode, RHE) and a half-wave potential (E1/2) of 0.94 V, both higher than those of the commercial Pt/C (Eonset = 0.95 V and E1/2 = 0.84 V), respectively. Assembled into Zn-air batteries, the optimized catalyst exhibited higher open circuit voltage (1.698 V) and peak power density (90 mW cm-2) than those of the commercial 20 wt% Pt/C (1.402 V and 80 mW cm-2), respectively. This work provided a straightforward manufacturing strategy for the design of hierarchical porous carbonbased ORR catalysts with desirable performance.
引用
收藏
页码:373 / 382
页数:10
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